aa9caaf657
merge of parallel duplicate work by Steve Price and myself. :-] There are some changes to the build that are my fault... mkinit.c was trying (poorly) to duplicate some of the work that make(1) is designed to do. The Makefile hackery is my fault too, the depend list was incomplete because of some explicit OBJS+= entries, so mkdep wasn't picking up their source file #includes. This closes a pile of /bin/sh PR's, but not all of them.. Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter
457 lines
9.6 KiB
C
457 lines
9.6 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: options.c,v 1.6 1995/10/09 17:56:32 joerg Exp $
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*/
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#ifndef lint
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static char sccsid[] = "@(#)options.c 8.2 (Berkeley) 5/4/95";
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#endif /* not lint */
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#include <signal.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "shell.h"
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#define DEFINE_OPTIONS
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#include "options.h"
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#undef DEFINE_OPTIONS
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#include "nodes.h" /* for other header files */
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#include "eval.h"
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#include "jobs.h"
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#include "input.h"
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#include "output.h"
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#include "trap.h"
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#include "var.h"
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#include "memalloc.h"
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#include "error.h"
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#include "mystring.h"
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#ifndef NO_HISTORY
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#include "myhistedit.h"
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#endif
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char *arg0; /* value of $0 */
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struct shparam shellparam; /* current positional parameters */
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char **argptr; /* argument list for builtin commands */
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char *optarg; /* set by nextopt (like getopt) */
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char *optptr; /* used by nextopt */
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char *minusc; /* argument to -c option */
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STATIC void options __P((int));
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STATIC void minus_o __P((char *, int));
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STATIC void setoption __P((int, int));
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/*
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* Process the shell command line arguments.
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*/
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void
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procargs(argc, argv)
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int argc;
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char **argv;
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{
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int i;
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argptr = argv;
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if (argc > 0)
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argptr++;
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for (i = 0; i < NOPTS; i++)
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optlist[i].val = 2;
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options(1);
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if (*argptr == NULL && minusc == NULL)
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sflag = 1;
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if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
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iflag = 1;
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if (mflag == 2)
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mflag = iflag;
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for (i = 0; i < NOPTS; i++)
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if (optlist[i].val == 2)
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optlist[i].val = 0;
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arg0 = argv[0];
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if (sflag == 0 && minusc == NULL) {
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commandname = arg0 = *argptr++;
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setinputfile(commandname, 0);
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}
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if (*argptr && minusc)
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/* Posix.2: first arg after -c cmd is $0, remainder $1... */
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arg0 = *argptr++;
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shellparam.p = argptr;
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/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
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while (*argptr) {
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shellparam.nparam++;
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argptr++;
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}
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optschanged();
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}
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void
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optschanged()
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{
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setinteractive(iflag);
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#ifndef NO_HISTORY
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histedit();
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#endif
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setjobctl(mflag);
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}
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/*
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* Process shell options. The global variable argptr contains a pointer
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* to the argument list; we advance it past the options.
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*/
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STATIC void
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options(cmdline)
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int cmdline;
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{
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register char *p;
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int val;
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int c;
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if (cmdline)
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minusc = NULL;
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while ((p = *argptr) != NULL) {
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argptr++;
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if ((c = *p++) == '-') {
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val = 1;
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if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
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if (!cmdline) {
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/* "-" means turn off -x and -v */
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if (p[0] == '\0')
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xflag = vflag = 0;
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/* "--" means reset params */
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else if (*argptr == NULL)
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setparam(argptr);
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}
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break; /* "-" or "--" terminates options */
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}
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} else if (c == '+') {
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val = 0;
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} else {
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argptr--;
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break;
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}
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while ((c = *p++) != '\0') {
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if (c == 'c' && cmdline) {
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char *q;
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#ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */
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if (*p == '\0')
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#endif
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q = *argptr++;
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if (q == NULL || minusc != NULL)
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error("Bad -c option");
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minusc = q;
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#ifdef NOHACK
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break;
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#endif
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} else if (c == 'o') {
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minus_o(*argptr, val);
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if (*argptr)
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argptr++;
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} else {
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setoption(c, val);
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}
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}
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}
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}
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STATIC void
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minus_o(name, val)
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char *name;
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int val;
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{
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int i;
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if (name == NULL) {
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out1str("Current option settings\n");
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for (i = 0; i < NOPTS; i++)
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out1fmt("%-16s%s\n", optlist[i].name,
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optlist[i].val ? "on" : "off");
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} else {
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for (i = 0; i < NOPTS; i++)
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if (equal(name, optlist[i].name)) {
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setoption(optlist[i].letter, val);
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return;
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}
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error("Illegal option -o %s", name);
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}
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}
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STATIC void
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setoption(flag, val)
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char flag;
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int val;
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{
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int i;
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for (i = 0; i < NOPTS; i++)
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if (optlist[i].letter == flag) {
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optlist[i].val = val;
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if (val) {
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/* #%$ hack for ksh semantics */
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if (flag == 'V')
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Eflag = 0;
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else if (flag == 'E')
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Vflag = 0;
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}
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return;
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}
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error("Illegal option -%c", flag);
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}
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#ifdef mkinit
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INCLUDE "options.h"
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SHELLPROC {
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int i;
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for (i = 0; i < NOPTS; i++)
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optlist[i].val = 0;
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optschanged();
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}
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#endif
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/*
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* Set the shell parameters.
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*/
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void
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setparam(argv)
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char **argv;
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{
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char **newparam;
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char **ap;
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int nparam;
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for (nparam = 0 ; argv[nparam] ; nparam++);
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ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
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while (*argv) {
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*ap++ = savestr(*argv++);
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}
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*ap = NULL;
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freeparam(&shellparam);
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shellparam.malloc = 1;
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shellparam.nparam = nparam;
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shellparam.p = newparam;
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shellparam.optnext = NULL;
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}
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/*
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* Free the list of positional parameters.
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*/
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void
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freeparam(param)
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struct shparam *param;
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{
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char **ap;
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if (param->malloc) {
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for (ap = param->p ; *ap ; ap++)
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ckfree(*ap);
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ckfree(param->p);
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}
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}
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/*
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* The shift builtin command.
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*/
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int
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shiftcmd(argc, argv)
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int argc;
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char **argv;
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{
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int n;
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char **ap1, **ap2;
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n = 1;
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if (argc > 1)
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n = number(argv[1]);
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if (n > shellparam.nparam)
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error("can't shift that many");
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INTOFF;
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shellparam.nparam -= n;
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for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
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if (shellparam.malloc)
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ckfree(*ap1);
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}
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ap2 = shellparam.p;
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while ((*ap2++ = *ap1++) != NULL);
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shellparam.optnext = NULL;
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INTON;
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return 0;
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}
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/*
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* The set command builtin.
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*/
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int
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setcmd(argc, argv)
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int argc;
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char **argv;
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{
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if (argc == 1)
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return showvarscmd(argc, argv);
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INTOFF;
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options(0);
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optschanged();
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if (*argptr != NULL) {
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setparam(argptr);
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}
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INTON;
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return 0;
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}
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/*
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* The getopts builtin. Shellparam.optnext points to the next argument
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* to be processed. Shellparam.optptr points to the next character to
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* be processed in the current argument. If shellparam.optnext is NULL,
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* then it's the first time getopts has been called.
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*/
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int
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getoptscmd(argc, argv)
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int argc;
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char **argv;
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{
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register char *p, *q;
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char c;
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char s[10];
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if (argc != 3)
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error("Usage: getopts optstring var");
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if (shellparam.optnext == NULL) {
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shellparam.optnext = shellparam.p;
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shellparam.optptr = NULL;
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}
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if ((p = shellparam.optptr) == NULL || *p == '\0') {
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p = *shellparam.optnext;
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if (p == NULL || *p != '-' || *++p == '\0') {
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atend:
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fmtstr(s, 10, "%d", shellparam.optnext - shellparam.p + 1);
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setvar("OPTIND", s, 0);
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shellparam.optnext = NULL;
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return 1;
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}
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shellparam.optnext++;
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if (p[0] == '-' && p[1] == '\0') /* check for "--" */
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goto atend;
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}
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c = *p++;
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for (q = argv[1] ; *q != c ; ) {
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if (*q == '\0') {
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out1fmt("Illegal option -%c\n", c);
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c = '?';
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goto out;
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}
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if (*++q == ':')
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q++;
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}
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if (*++q == ':') {
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if (*p == '\0' && (p = *shellparam.optnext++) == NULL) {
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out1fmt("No arg for -%c option\n", c);
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c = '?';
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goto out;
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}
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setvar("OPTARG", p, 0);
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p = NULL;
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}
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out:
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shellparam.optptr = p;
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s[0] = c;
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s[1] = '\0';
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setvar(argv[2], s, 0);
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return 0;
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}
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/*
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* XXX - should get rid of. have all builtins use getopt(3). the
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* library getopt must have the BSD extension static variable "optreset"
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* otherwise it can't be used within the shell safely.
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*
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* Standard option processing (a la getopt) for builtin routines. The
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* only argument that is passed to nextopt is the option string; the
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* other arguments are unnecessary. It return the character, or '\0' on
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* end of input.
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*/
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int
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nextopt(optstring)
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char *optstring;
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{
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register char *p, *q;
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char c;
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if ((p = optptr) == NULL || *p == '\0') {
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p = *argptr;
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if (p == NULL || *p != '-' || *++p == '\0')
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return '\0';
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argptr++;
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if (p[0] == '-' && p[1] == '\0') /* check for "--" */
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return '\0';
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}
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c = *p++;
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for (q = optstring ; *q != c ; ) {
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if (*q == '\0')
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error("Illegal option -%c", c);
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if (*++q == ':')
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q++;
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}
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if (*++q == ':') {
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if (*p == '\0' && (p = *argptr++) == NULL)
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error("No arg for -%c option", c);
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optarg = p;
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p = NULL;
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}
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optptr = p;
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return c;
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}
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